Major portion of the earth’s crust is mainly constituted by

A. Oxygen and Iron

B. Oxygen and Silicon

C. Silicon and Iron

D. Silicon and Aluminium

Answer: Option B

Solution(By Examveda Team)

Oxygen is the most abundant element in the earth’s crust, comprising 46.6% or the crust by weight. Silicon 28%, aluminum 8.2%, iron 5.6%, calcium 4.2%, sodium 2.5%, magnesium 2.4%, potassium, 2.0%, and titanium 0.61% also comprise the crust. Given the abundance of oxygen and silicon, the silicates are the most abundant minerals in the earth’s crust.